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Montana Field Guide

Montana Field Guides

Nodding Saxifrage - Saxifraga cernua


Global Rank: G5
State Rank: S3S4
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 8

External Links






State Rank Reason (see State Rank above)
Numerous collections from Granite, Missoula, Madison, Beaverhead, Glacier, Park, Deer Lodge counties. Not particularly rare.

Probably currently secure in its high elevation habitats.
 
General Description
Short-lived, fibrous-rooted perennial. Stems erect, 4–20 cm, glabrous to glandular. Leaves basal and cauline, petiolate; the blades reniform, 5–15 mm wide with 3 to 7 shallow lobes, glabrous, with rice-like bulblets in basal axils and small purple bulblets in the cauline axils. Inflorescence a glandular raceme or panicle with all but the terminal flower replaced by purple bulblets. Flower: calyx cup-shaped with lobes 1–2 mm long; hypanthium ca. 1 mm long; petals white, 5–8 mm long, oblanceolate; ovary inferior. Capsule rarely maturing (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Differs from Saxifraga debile in having bulblets in the cauline leaf axils. In this character, it resembles Saxifraga ferruginea, but that species tends to have several, not one, flower and small flower parts.

Species Range
Present
 


Range Comments
Circumpolar south to WA, NV, NM and SD (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 13

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Moist or wet, gravelly, sparsely-vegetated soil of wet cliffs, turf, boulder fields; upper subalpine, alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Nodding Saxifrage — Saxifraga cernua.  Montana Field Guide.  .  Retrieved on , from